I used scrap cardboard to make the disk, yarn from my stash, and a tapestry needle. Started her out on a larger, plastic needle, but then we needed to switch to a smaller one, to accommodate beads.
It took a couple tries to start it and get it going right, but that was all my fault. (Note: Make sure you have an odd number of notches cut out of your disk rather than an even number. Unless you enjoy being confused as to why the stitches are not lining up correctly.) It was a little fiddly at first, but eventually began to flow. It isn't finished yet, but almost halfway done. And coincidentally matchy with her outfit today, as well as a nearby My Little Pony.